ocfs2: keep index within status_map[]

Do not exceed array status_map[]

Signed-off-by: Roel Kluin <[e-mail]>
Cc: Mark Fasheh <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Joel Becker <[e-mail]>

fs/ocfs2/stack_o2cb.c

···
  * General Public License for more details.
  */
 
+#include <linux/kernel.h>
 #include <linux/crc32.h>
 #include <linux/module.h>
 
···
 
 static int dlm_status_to_errno(enum dlm_status status)
 {
-	BUG_ON(status > (sizeof(status_map) / sizeof(status_map[0])));
+	BUG_ON(status < 0 || status >= ARRAY_SIZE(status_map));
 
 	return status_map[status];
 }